Equivalence of large chip-synchronous and symbol-synchronous CDMA systems

Author

Hwang, Chien-Hwa

Author_Institution

Inst. of Commun. Eng., Nat. Tsing Hua Univ., Hsinchu

fYear

2005

fDate

4-9 Sept. 2005

Firstpage

204

Lastpage

208

Abstract

This paper considers a large chip-synchronous (CS) random spreading CDMA system. It is shown that, conditioned on all deterministic asynchronous delays, its asymptotic eigenvalue moments of the correlation matrix are equal to those of the symbol-synchronous (SS)-CDMA. Moreover, for a receiver in the family proposed in D. Guo, S. Verdu and L. K. Rasmussen, IEEE Inform. Theory, Dec. 2002, the output has the same distribution in large CS- and SS-CDMA, i.e. a Gaussian with the same conditional mean and variance. Furthermore, although the linear successive interference cancellation (LSIC) is not a member of receivers mentioned above, the asymptotic distribution of the output is the same Gaussian in SS- and CS-CDMA

Keywords

code division multiple access; correlation methods; delays; eigenvalues and eigenfunctions; interference spectroscopy; asymptotic eigenvalue moments; correlation matrix; deterministic asynchronous delays; large chip-synchronous CDMA system; linear successive interference cancellation; random spreading CDMA system; symbol-synchronous CDMA system; AWGN; Additive white noise; Bandwidth; Decorrelation; Delay; Detectors; Eigenvalues and eigenfunctions; Interference cancellation; Multiaccess communication; Polynomials;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory, 2005. ISIT 2005. Proceedings. International Symposium on

Conference_Location

Adelaide, SA

Print_ISBN

0-7803-9151-9

Type

conf

DOI

10.1109/ISIT.2005.1523323

Filename

1523323